/*
 * Copyright 2002-2021 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      https://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.springframework.core;

/**
 * 一个用于检测GraalVM本地图像环境的通用委托。
 *
 * 需要使用{@code -H:+InlineBeforeAnalysis}本地图像编译器标志，以允许在构建时删除代码。
 *
 * @author Sebastien Deleuze
 * @since 5.3.4
 */
public abstract class NativeDetector {

	// See https://github.com/oracle/graal/blob/master/sdk/src/org.graalvm.nativeimage/src/org/graalvm/nativeimage/ImageInfo.java
	private static final boolean imageCode = (System.getProperty("org.graalvm.nativeimage.imagecode") != null);

	/**
	 * 如果在构建图像的背景下或在图像运行期间调用，返回{@code true}，否则{@code false}。
	 */
	public static boolean inNativeImage() {
		return imageCode;
	}
}
